I don't think you fully understood the purpose of the project. He wanted an end product (the bookshelf app) that he had been putting off due to the time commitment. He did not say he wanted to learn about how to program in general, nor did he even say he liked programming. People care about results and the end product. If you like to program as a hobby, LLMs in no way stop you from doing this. At the end of the day, people with your viewpoint fall short of convincing people against using AI because you are being extremely condescending to the desires of regular people. Also, it is quite ironic that you attempted to make a point about him not reading all 500 books on his bookshelf, yet you don't seem to have read (or understood) the opening section of the post.